US · guidance
CMS Pub. 100-08, ch. 3, § 3.7.1.2
Vignettes
This section applies to MACs.
The following vignettes provide guidance on how the MACs shall characterize and
respond to varying levels of confirmed errors. These are examples of results from
medical review accompanied by suggested corrective actions. This information should
only be used as a guide and is not meant to be a comprehensive list of vignettes nor an
inclusive list of administrative actions. The MAC MR department shall include
communication and follow-up with provider outreach and education (POE) throughout
the PCA process to coordinate efforts toward problem resolution. The MACs shall
monitor trends indicating widespread educational need and shall ensure that POE staff
has access to copies of all MR provider notification and feedback letters so they are
prepared for provider requests for education (See IOM Pub. 100-04, chapter 20, §3.4.2,
for further information).
1. Twenty claims from one provider are reviewed. Once claim is denied because a
physician signature is lacking on the plan of care. The denial reflects 7 percent of
the dollar amount of claims reviewed. Judicious assessment of medical review
resources indicates no further review is necessary at this time. The MAC uses
data analysis to determine where to target medical review activities in the future.
2. Forty claims from one provider are reviewed. Twenty claims are for services
determined to be not reasonable and necessary. These denials reflect 50 percent
of the dollar amount of claims reviewed. One hundred percent prepayment
review is initiated due to the high number of claims denied and the high dollar
amount denied. The MAC provides notification to the provider about specific
errors made and makes a priority referral to POE to inform them of the severity of
the problem.
3. Forty claims from one provider are reviewed. Thirty-five claims are denied.
These denials reflect 70 percent of the dollar amount of claims reviewed.
Payment suspension is initiated due to the high denial percentage and the
Medicare dollars at risk. The MAC provides notification to the provider about the
specific errors made and makes a priority referral to POE to inform them of the
severity of the problem.
4. Forty claims from one provider are reviewed. Thirty-three claims are denied.
These denials reflect 25 percent of the dollar amount of the claims reviewed. The
MAC provides notification to the provider about the specific errors made. The
MAC initiates a moderate amount (e.g., 30 percent) of prepayment medical
review to ensure proper billing.
5. Thirty-five claims from one provider are reviewed. Thirty claims are denied
representing 75 percent of the dollar amount of the claims reviewed. Many of the
denials represent services provided to beneficiaries who did not meet the
Medicare eligibility requirements. The MAC provides notification to the provider
about specific errors made and makes a priority referral to POE to inform them of
the severity of the problem. A consent settlement offer is made but declined by
the provider. A postpayment review of statistical sampling for overpayment
estimation is performed and an overpayment is projected to the universe of similar
claims from the provider. Overpayment collection is initiated.
6. Twenty-five claims from one supplier are reviewed. Five claims representing 5
percent of the dollar amount of the claims are denied. This supplier is known to
the DME MAC as one who has a significant decrease in billing volume when
targeted medical review is initiated. The DME MAC is concerned that this
supplier may be selectively submitting bills when placed on medical review and
chooses to continue some level of prepayment medical review despite the low
error rate.
7. Twenty claims from one provider are reviewed. Ten claims are denied for
incomplete physician orders representing 65 percent of the dollar amount of the
claims. The MAC issues a letter to inform the home health agency (HHA) about
the denials and the reason for the denials. In response to the notification letter,
the agency owner initiated a mandatory training program for select staff. The
HHA was put on 30 percent prepayment medical review. Results of the review
indicated an improvement in the error rate to 30 percent (based on dollars denied
divided by dollars reviewed). On appeal, most of the denials were overturned.
The MAC consults with the ALJ to understand why the cases are being
overturned and consults with the RO on appropriate next steps.
History
(Rev. 377, Issued: 05-27-11, Effective: 06-28-11, Implementation: 06-28-11)
Provenance
- Source
- cms.gov
- Retrieved
- 2026-08-25
- Edition
- iom-2026-08-25
- Content hash
298743de956e1f665c57c215c107c8b781f9de26c049ab18356f177227ed2e55
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